Let's break down the movements step by step:
1. The person starts at the origin point (0, 0).
2. Travels 4 km north: This takes him to (0, 4).
3. Travels 5 km east: This takes him to (5, 4).
4. Travels 10 km rightwards: From (5, 4), moving right (east) takes him to (15, 4).
5. Travels 3 km to the left: From (15, 4), moving left (west) takes him to (12, 4).
6. Finally, travels 5 km north: From (12, 4), moving north takes him to (12, 9).
Now we